| FASTENER LENGTH | 3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM |
| HEAD HEIGHT | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| HEAD STYLE | BEVEL-CONICAL |
| HOLE CONFIGURATION STYLE | ROUND INTERNAL HEXAGON |
| HOLE DIAMETER | 0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM |
| HOLE QUANTITY | 4 |
| HOLE TYPE | DRILLED |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| WIDTH ACROSS FLATS | 0.375 INCHES MINIMUM AND 0.378 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES GRIP |
| SURFACE FINISH | 32.0 MICROINCHES THREADS |
| SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.788 INCHES MINIMUM AND 0.841 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |